DNA fingerprinting is a very quick way to compare the DNA sequences of any two individuals. Its aims to find out genetic differences between two individuals or among individuals of a population. It involves identifying differences in some specific regions in DNA sequence called as repetitive DNA; because in these sequences, a small stretch of DNA is repeated many times. These repetitive DNA are separated from bulk genomic DNA as different peaks during density gradient centrifugation. 

Uses of DNA fingerprinting are as follows:– 

(r) It is used in forensic laboratories to recognise criminals. 

(s) Structures of DNA of two persons are not same, except identical twins. So that, with the help of it may be recognise any one. 

(t) It is used in the case of paternity testing in courts. 

(u) It is useful to make genetic map of human genome. 

(v) By this method, gain knowledge of right parents of any child. 

(w)It is used to diagnose hereditary diseases. 

(x) It is used in determining lineages of humans and other animals to ascertain biological evolution.